Check your eligibility criteria for tender Improvements To Pit Lines Including Through Rail Renewal Secondary Of Existing 52Kg/90R Rails With 52Kg/90 Uts For A Length Of 1.185Km On Pit Line 1 And 2. Sw Ii : Yesvantpur : Improvements To Pit Lines Including Through Rail Renewal Secondary Of Existing 52Kg/90R Rails With 52Kg/90 Uts For A Length Of 1.135Km On Pit Line 3 And 4. Maintenance Period Is 6 Months Or One Monsoon Period Whichever Is Later.